In some charts the message "Some Data Is Unavailable" appears but graphs are being displayed in the chart.
What does that message mean?
If this message appears it means that some metrics of this chart are not available. The chart contains more than one metric (check the chart legend). If 2 metrics of 4 metrics are not available you will get this message. The 2 available metrics will be displayed at the same time.
This message is not an error, it is a hint that the chart is not complete.